Patent US3713487A successfully refreshed from Google Patents.
US3713487A
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US
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Explosive fracturing and propping of petroleum wells
Assignee: Dri-Frac Ltd
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Filing: 1970-12-30
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Granted: 1973-01-30
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Expires: 1990-12-30
Abstract
Abstract A method of stimulating the flow of petroleum fluids in a well. Explosive fracturing of the petroleum formation adjacent to the well is carried out in the presence of a propping agent, such as glass beads, sand or aluminum particles. The propping agentexplosive combination is preferably surrounded by granular ammonium nitrate explosive to insure the absence of voids in the well bore. The method avoids the necessity for the use of liquids for fracturing or propping, and this is advantageous in cases where the formation would be damaged by the use of liquids such as water or drilling fluids.
Inventors
- 👤 W Lozanski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:45
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/263; E21B43/267
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
A method of stimulating the flow of petroleum fluids in a well comprising the step of fracturing the petroleum formation adjacent the well by the action of an explosive charge in the presence of a propping agent, and in the absence of liquid, wherein the propping agent is chosen from the group consisting of glass beads, sand, and metal or ceramic particles, and wherein the explosive charge is stemmed with sand before detonation.
Claim 2
Independent Claim
73 words
A method of stimulating the flow of petroleum fluids in a well comprising the step of fracturing the petroleum formation adjacent the well by the action of an explosive charge in the presence of a propping agent, and in the absence of liquid, wherein the propping agent is chosen from the group consisting of glass beads, sand, and metal or ceramic particles, and wherein the explosive charge is stemmed with sand before detonation.
Claim 3
Dependent Claim
49 words
A method as in claim 1 comprising the steps of locating an explosive charge and a propping agent in the bore of the well, filling the void between the wall of the well bore and the explosive charge composition with further granular ammonium nitrate explosive, and detonating the charge.
Claim 4
Dependent Claim
23 words
A method as in claim 2 wherein the ammonium nitrate has a particle size of 8 to 16 on the U.S. Standard Scale.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |